This turtle was wandering around in the road near a pond on the UH campus. I wanted to help him get back (since he was clearly trying to hop the curb to do just that), but he kept hissing at me. ):

I didn't even know turtles could hiss. ):

Luckily it was an off day, and he was at the end of a dead end. So his risk was minimal. There was also an event on the other side of campus with a lot of foot traffic, so I have no doubt someone braver than I got him where he needed to go.